I have given up waiting for holley to reopen ece
I am getting 1 front drop rear 4 or 5 drop springs from gmcpauls I am willing to bet a dollar that they are the same as ece sold
With western chassis 2.5 drop spindles which where part of ece kit packages
Sway bars stock gm stuff I have one from a c20 and a c10 look at pick a parts at trucks up to 87 c30 are the best
Spindles have to decide which model your going to build 67 70 set will use 67 70 ball joint tie rods etc with 71 to 87 hd brakes
Here is the interchange sticky read this
http://67-72chevytrucks.com/vboard/s...d.php?t=456889